I just watched some youtube videos made by this guy Beans (I figured if he has youtube videos I can post his name) he was building the same system I want to build with all the same size buckets, bulkheads and the same 1.5" pvc pipe. His is just a little bit bigger than the 4 buckets I'm using and I'm using a large ice chest as my rez. It's explained a lot of info I needed to know, but I'm still a little confused about getting water back to the top of the buckets to make a waterfall effect? The system that failed due to uniseales. I used a submersible pump in the rez and ran a 3/4" flexible line to each bucket using T'sand 90 degree fittings I manged to connect it all to a 3/4" hole up on the side and as close to the top of the buckets as I could get. I used a 90 degree pvc fitting just pushed and taped into the 3/4" hole. It really didn't work that good, the first bucket got real good flow the others not so much only had 3 buckets and the last one was barely getting a trickle of water from the top return. I would like to use a inline pump but there is no way to send any H2o to the top of the buckets that way. I don't know if using a submersible pump and using the 3/4" hose with a shutoff valves that would allow me to regulate the flow would work. This is all because I want the waterfall effect inside the buckets.does anybody know what I;m talking about and if you do please tell me so I can know too. I'm sorry for the messed up post before I was using my phone on the way out the door to play in a pool match I won my 8-ball match but in the middle of my 9-ball match my damm back locked up I finished the match but lost.